This might not be possible, but I thought I would suggest it anyway.
I had a 3 hour trip home too, and we have some friends that own an RV. They let us borrow it. It was pretty crazy for my dad to drive that thing home from Chicago, but it was the most comfortable thing ever. I've heard that the drive home is very difficult, and I actually slept the entire way home. If that can't happen, I would just say the obvious. Bring lots and lots of pillows.
Hope things keep getting better for you all!